1.1 本规程详细说明了建立基于直接应力和剪切应力损伤的设计值的程序，用于GFRP容器和其他GFRP结构中所用材料的基于损伤的设计标准。本规程使用从四点梁弯曲试验和平面内剪切试验的声发射检测中获得的数据（见ASME第十节第RT-8条）。 1.2 在加载/重新加载循环的重新加载部分，存在显著的声发射，表明薄板损坏的开始。“重大排放”用历史指数定义。 1.3 单位- 以英寸-磅单位表示的值应视为标准值。 括号中给出的值是对SI单位的数学转换，仅供参考，不被视为标准值。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 基于损伤的设计方法将允许GFRP材料的额外设计方法。这是一种非常有用的技术，可用于确定不同类型树脂的性能和GFRP材料的组成，以开发耐损伤和可靠的设计。这种基于AE的方法不是唯一的，也可以使用其他损伤敏感评估方法。 5.2 该实践涉及使用声发射仪器和检查技术作为损伤检测手段，以支持破坏性试验，从而得出基于损伤的设计应力。 5.3 这种做法不打算作为长期- GFRP材料的长期性能（如容器中使用的材料）。因此，规范和标准要求对不属于本规范一部分的原型（例如船舶）进行循环验证测试。 5.4 存在并允许使用其他设计方法。

1.1 This practice details procedures for establishing the direct stress and shear stress damage-based design values for use in the damage-based design criterion for materials to be used in GFRP vessels and other GFRP structures. The practice uses data derived from acoustic emission examination of four-point beam bending tests and in-plane shear tests (see ASME Section X, Article RT-8). 1.2 The onset of lamina damage is indicated by the presence of significant acoustic emission during the reload portion of load/reload cycles. “Significant emission” is defined with historic index. 1.3 Units— The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The damage-based design approach will permit an additional method of design for GFRP materials. This is a very useful technique to determine the performance of different types of resins and composition of GFRP materials in order to develop a damage tolerant and reliable design. This AE-based method is not unique, other damage-sensitive evaluation methods can also be used. 5.2 This practice involves the use of acoustic emission instrumentation and examination techniques as a means of damage detection to support a destructive test, in order to derive the damage-based design stress. 5.3 This practice is not intended as a definitive predictor of long-term performance of GFRP materials (such as those used in vessels). For this reason, codes and standards require cyclic proof testing of prototypes (for example, vessels) which are not a part of this practice. 5.4 Other design methods exist and are permitted.